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https://github.com/Tonejs/Tone.js
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98 lines
No EOL
3 KiB
JavaScript
98 lines
No EOL
3 KiB
JavaScript
define(["Tone/core/Tone", "Tone/effect/StereoXFeedbackEffect", "Tone/signal/Signal"],
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function(Tone){
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"use strict";
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/**
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* @class Tone.PingPongDelay is a feedback delay effect where the echo is heard
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* first in one channel and next in the opposite channel. In a stereo
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* system these are the right and left channels.
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* PingPongDelay in more simplified terms is two Tone.FeedbackDelays
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* with independent delay values. Each delay is routed to one channel
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* (left or right), and the channel triggered second will always
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* trigger at the same interval after the first.
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*
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* @constructor
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* @extends {Tone.StereoXFeedbackEffect}
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* @param {Time|Object} [delayTime] The delayTime between consecutive echos.
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* @param {NormalRange=} feedback The amount of the effected signal which
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* is fed back through the delay.
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* @example
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* var pingPong = new Tone.PingPongDelay("4n", 0.2).toMaster();
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* var drum = new Tone.DrumSynth().connect(pingPong);
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* drum.triggerAttackRelease("C4", "32n");
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*/
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Tone.PingPongDelay = function(){
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var options = this.optionsObject(arguments, ["delayTime", "feedback"], Tone.PingPongDelay.defaults);
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Tone.StereoXFeedbackEffect.call(this, options);
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/**
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* the delay node on the left side
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* @type {DelayNode}
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* @private
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*/
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this._leftDelay = this.context.createDelay(options.maxDelayTime);
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/**
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* the delay node on the right side
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* @type {DelayNode}
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* @private
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*/
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this._rightDelay = this.context.createDelay(options.maxDelayTime);
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/**
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* the predelay on the right side
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* @type {DelayNode}
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* @private
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*/
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this._rightPreDelay = this.context.createDelay(options.maxDelayTime);
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/**
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* the delay time signal
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* @type {Time}
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* @signal
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*/
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this.delayTime = new Tone.Signal(options.delayTime, Tone.Type.Time);
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//connect it up
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this.effectSendL.chain(this._leftDelay, this.effectReturnL);
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this.effectSendR.chain(this._rightPreDelay, this._rightDelay, this.effectReturnR);
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this.delayTime.fan(this._leftDelay.delayTime, this._rightDelay.delayTime, this._rightPreDelay.delayTime);
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//rearranged the feedback to be after the rightPreDelay
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this._feedbackLR.disconnect();
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this._feedbackLR.connect(this._rightDelay);
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this._readOnly(["delayTime"]);
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};
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Tone.extend(Tone.PingPongDelay, Tone.StereoXFeedbackEffect);
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/**
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* @static
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* @type {Object}
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*/
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Tone.PingPongDelay.defaults = {
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"delayTime" : 0.25,
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"maxDelayTime" : 1
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};
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/**
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* Clean up.
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* @returns {Tone.PingPongDelay} this
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*/
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Tone.PingPongDelay.prototype.dispose = function(){
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Tone.StereoXFeedbackEffect.prototype.dispose.call(this);
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this._leftDelay.disconnect();
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this._leftDelay = null;
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this._rightDelay.disconnect();
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this._rightDelay = null;
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this._rightPreDelay.disconnect();
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this._rightPreDelay = null;
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this._writable(["delayTime"]);
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this.delayTime.dispose();
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this.delayTime = null;
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return this;
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};
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return Tone.PingPongDelay;
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}); |